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consider system shown in fig. 1. the coeffecient of kinetic friction between block a (m=10 kg) and the table is 0.20. calculate the weight of the hanging block required if this block is to descend at constant speed once it has been set into motion.

a bottle is given a push along a tabletop and slides off the edge of a table. neglect air resistance. a) what force are exerted on the bottle while it is falling from the table to the floor? b) what is the reaction to each force ,that is, on what body and...

a window washer pushes his scrub brush up a vertical window at a constant speed by applying a force f. the brush weighs 8N and the coefficient of friction is 0.4. calculate a) the magnitude of the force f. b) the normal force exerted by the window on the...

what has no beginning and no end. it is also considered as the medium for light in einstein's theory of relativity

the sun goes the starry vault once a year, the moon goes completely around every month. does it follow the same path as the sun??

what are the two things that determined the path of an object launched at an angle to the horizontal.

object a does a freefall motion from an 80-m building and object b thrown upward from the base at the same time. they collide after 2s. find the initial velocity of object b. height is 80 m.

block a in figure 1 has a mass of 10kg, and block b has a mass of 30 kg. the coefficient of friction between b and the horizontal surface is 0.3. a) what is the mass of block c if block b is moving with an acceleration of 3m/s/s b) what is the tension in...

a block of ice released from rest at top of 400 m long ramp slides to the bottom in 2.20 seconds. what is the angle between the ramp and the horizontal

what if air resistancec is neglected. is it the same as this??